one
It has one.
An empty cone (like an ice-cream cone) doesn't have any flat surfaces. It has two curved surfaces, one outside and one inside. A solid cone has a flat base, and one other curved surface.
a cone has 2 surfaces Surfaces: 2 (the base and the slanted surface) Edges: 1 (the joining of base with the slanted surface) Corners: 1 (the apex)
None. There is one curved suface but no plane surface.
If it is a right circular cone, it has an infinite number of planes of symmetry. If it is an oblique circular cone, it has one plane of symmetry.
a cone has 1 curvedsurface.
ONE
A cone has one curved surface.
A cone has either one or two surfaces and either one or no edges.
It has one.
1
1
A cone has two surfaces, one vertex and no edges.
1 edge and 2 surfaces
Sphere, ellipsoid, torus, paraboloid, hyperboloid are shapes with only curved surfaces. Hemisphere, quadrant, cone and cylinder are examples of shapes with curved and plane surfaces. There are, of course, many others.
ther is 20 surfaces on a cone because the is 1 on it sharp part * * * * * In fact, one flat surface (and one curved one).
The flat and the curved surfaces. In ice cream cone terms the ice cream and the cone are the two surfaces. Even if you eat the ice cream and the cone gets empty there are 2 surfaces, the inside and the outside curved surfaces.